474 BULLETIN OK THK I'.MTED STATES FISH COMMISSION. 



4. Diliolliriinn ant/unldlum Kuil(il])lii. InleMinc. [PI. xxiv, R^. 2(K), o, />, c] 



Tliirty-si'vcn yoiiii}? strobile.", .\ugiist L'l, 1S99. These afrree elosely with Piesing's .synopsis «l 

 this species: "Head elon}»ate, tetragonal, slender, with ohlong lateral liothria; neck very short. First 

 segments elongatetl, very narrow; succeeding segments shorter, snlxinadrate." 



The ontline of the head varies with the state of contr.iction, l)iit the prevailing form is linear- 

 olilong or somewhat clavale. Segments slender, almost cylindrical, slightly enlarged at their jKisterior 

 ends. Dimensions oi an alcoliolii' specimen in millimeters: Length of liead, l.I'i; hrcadth,' anterior 

 0.:?;^, greatest hrcadth 0.:«, posterior 0.1!). Another: Jx-ngtli of head, 1.21; hreadtli, anterior 0.22. 

 greatest lireadth 0.2(>, j«istenor 0.17. I.rf^)nge.«t head mea.«nri'd l.ii2 mm. in length to the lirst distinct 

 segment. Tlie strobiles are linear or nearlj; so and measured about 25 mm. in li'ugth. 



0. I'liylloliothrium »\t. Immature. Intestine. [PI. x.\, figs. 2.'{1, 2."i2.] 



Three si)ecimens collected July 11, 1!M)0, hear some resenddance to larva' which are not infrequent 

 in the common squid. (4, ].. 792, pi. i.xii, tigs. 1-9.) Head wlnte, witli four hothria, which have 

 cruiii|)lcd borders and an au.<iliary acetabulum on anterior bonier of each. There is also a nm.-ii-ular 

 sucker ( niy/.orhyuchus) on anterior part of head " betwi'cn the bothria. Neck linear, ligulate, 

 translucent, the ves.«els of water va.«cular system showing plaiidy as simious lateral lines, in preserved 

 speciuiens, liliform. Body fusiform, appres.«ed, oi>iV|Ue, pinkish. The large.«t speciuTen mea'sui-ed in 

 life 44 mm. in length. Ix^nglh of head, 3 nun.; of liead and neck, 2t) nun.; of IjcmIv, iS nun. 

 G. Jihjncholivlhriiiin sp. Encysted on viscera, especially on i)yloric c-eca. 7, ji. 282. Kriuml also in 

 lS99and 1900. 



Immense nund>ei-s of small pyrifonn i ysts, 2 to ."> nun. long, were fomid on pyloric c;eca of a silver 

 hake, .Inly 1 1, 1900. Dimensions of one of the.-ie larv.i' in millimeters: Ixugth, :!; length of heail, 0.,><7; 

 of contractile bulbs, 1.02; of prolK)sci(les, esliniatecl, 1.74; diameter of proboscis, iiici.idiug hooks, 0.1.5; 

 length of longi^r hooks, 0.07; diaiueter of contractile liulbs, 0.12. The hooks differ from any I liave 

 yet seen, bearing some resemblance to those of Tilinrlnniihu.i rriiKiieiis. [PI. xxii, tigs. 251-2.54.] 



7. 1/irrnl rintodi-s {Scolex pnli/niorjihvx Dnjanlin). Free in intestine. 7, p. 282. See 4, p. 789, etc. 

 F.iund also in 1WI9 and liHlO. 



TUK.M.VrODKS. 



5. Di.itdiiiitiii iirrciiltiiii Molin. Intestine. See I, p. 514, etc. 7, ]ip. 2S2. 2S,'<. pi. \\\v, figs. 10-24. 



Found also Aug. 21, 189!»; 10. 

 9. Dixlomnm rilclliixuiii Linton. Intestine. 7, pp. 2.^2, 290. Found Aug. 21, 1899; IS. [PI. xxx, 

 fig. 3:».] 



Pollachius virens, I'n/lorl:. 



M;MAroi)i->;. 



1. Axcririx rldnalii Ku<iolplii. Stomach. 7, pji. 28:i, 302, pi. xi.iii, ligs. 10.5-108. 



In the U. S. National Museum collection there are thn-e specimens from the jwillock which 

 eviilently belong to this species. While they, together with tluwe from the cml, present many 

 variations, they iigree in having the posterior end truncateil and the upper lip oblong with a somewhat 

 cylindrical jiulp. The .side meud)raiies were not e;isily seen in all. The adults of both sexes are more 

 altciuiat<' :uitcriorly than ])osteriiu'ly, while the males are shorter and relatively stouter than the 

 females. See under Gailiix ciilliiriiix. No. 2. 

 1(1. Iiiiiixilnrr unixiloihs. 



Six lots in I'. S. National Museum collection from body cavity. Specimens iuclo.-ed in eud)ryonic 

 cuticle. Length about 24 nmi., head truncate, tail, with inucronate tip. Collected in October and 

 November, I.S8(i. 



tfiSTODKS. 



2. liliiiiirhiiliiitliriiiiii. Larv;e en(^yst*»d on mesentery. 7, p. 2S;{. 



TliK.M ATOnES. 



3. PiirJyhroh/le (Imlieulaliti)i ()\it-<m. [OiloliDlhniiiii <//'/i/i>h?<i/io;i Olsson.] tiills. 7, pp. 283, 28fi, pi. 



XXXIII, tigs. O-IO. 



